replace OVERRIDE and FINAL with override and final in athena/

athena/extensions/athena_app_delegate_base.cc

Index: athena/extensions/athena_app_delegate_base.cc
diff --git a/athena/extensions/athena_app_delegate_base.cc b/athena/extensions/athena_app_delegate_base.cc
index 451fc981fbcc240c4439aa0627e0a2c60a70f62b..3c4a1e49cf56c416d342e62fb8930611dfae17be 100644
--- a/athena/extensions/athena_app_delegate_base.cc
+++ b/athena/extensions/athena_app_delegate_base.cc
@@ -41,7 +41,7 @@ class AthenaAppDelegateBase::NewActivityContentsDelegate
   // content::WebContentsDelegate:
   virtual content::WebContents* OpenURLFromTab(
       content::WebContents* source,
-      const content::OpenURLParams& params) OVERRIDE {
+      const content::OpenURLParams& params) override {
     if (!source)
       return NULL;
     return OpenURLInActivity(source->GetBrowserContext(), params);